In my case quite a lot of the time. Which is why Google Keep as a web app is useless but the Android version is very useful.

Also I don't understand why so many people on HN are concentrating on the simultaneous editing scenario, for most ordinary people this is actually quite a rare event especially in their private lives. Google Keep on Android seems to work pretty well in his context my family uses it to share shopping lists and other notes very successfully even hough several of us are online only intermittently.